gotris/lib/scene.go

package lib

import (
	"github.com/hajimehoshi/ebiten/v2"
	"github.com/hajimehoshi/ebiten/v2/ebitenutil"
)

// Scenes: Main Menu
// Game Mode

type GameEvent struct {
	Type int
}

type HandleResult int

const (
	EventNoOp int = iota
	EventKeyRelease
)

const (
	DoNothing HandleResult = iota
	EndProgram
)

// Scene is the highest level organization unit of a Game. It handles events.
// A game has a currently active scene, and can transition
type Scene interface {
	// Handles a game event and returns a result.
	HandleEvent(*GameEvent) HandleResult
	Draw(screen *ebiten.Image)
}

type MainMenuScene struct {
	selections            [1]string
	currentSelectionIndex int
}

func (menu *MainMenuScene) HandleEvent(e *GameEvent) HandleResult {
	if e.Type == 1 {
		if menu.selections[menu.currentSelectionIndex] == "Quit" {
			return EndProgram
		}
	}
	return DoNothing
}

func (menu *MainMenuScene) Draw(screen *ebiten.Image) {
	ebitenutil.DebugPrint(screen, menu.selections[menu.currentSelectionIndex])
}